When comparing the speed of the 2big to the Seagate GoFlex Desk ( Macworld rated 4 out of 5 mice ) 4TB with the FireWire 800 dock attached, we see that the internal SSD is not the bottleneck in that testing. The 2big was nearly three times as fast at writing files and folders and a little more than twice as fast as that drive reading the same data. The AJA System test showed the 2big to be about four times as fast as the Seagate writing and 3.5 times as fast reading.
Macworld's buying advice
With 6TB of storage and fast Thunderbolt read and write speeds, the LaCie 2Big Thunderbolt Series drive offers fast speeds for backup or video processing. Like all other Thunderbolt drives we've seen, the 2big doesn't offer any other ports for connecting to older Macs or PCs without Thunderbolt.
James Galbraith is Macworld's lab director.